SU870119A1

SU870119A1 - Portable motor saw

Info

Publication number: SU870119A1
Application number: SU802872620A
Authority: SU
Inventors: Эрнст Александрович Келлер
Original assignee: Пермский политехнический институт
Priority date: 1980-01-21
Filing date: 1980-01-21
Publication date: 1981-10-07

Description

(54) ПЕРЕНОСНАЯ МОТОРНАЯ ПИЛА(54) PORTABLE MOTOR SAW

II

Изобретение относитс к мотоинструментам и может быть использовано в лесной и деревообрабатывающей промышленности .The invention relates to motor tools and can be used in the timber and woodworking industry.

Известна переносна моторна плита, содержаща двигатель с пильным аппаратом и стойкой, бензобак, опорную раму с руко тками управлени , соединенную при помощи упругих элементов со стойкой, снабженной динамическим гасителем 1.A known portable motor plate comprising a motor with a sawing unit and a stand, a gas tank, a support frame with control handles connected by means of elastic elements to a stand equipped with a dynamic absorber 1.

Недостатками известной конструкции вл ютс большой вес гасител колебаний и незначительное снижение уровн вибрации на двигателе и руко тках.The disadvantages of the known construction are the large weight of the vibration damper and the slight decrease in the level of vibration on the engine and handles.

Известна переносна моторна пила , содержаща двигатель с пильным аппаратом , стойку с проушинами и ст жным винтом , руко тки управлени , жестко св занные в опорную раму, соединенную с проущинами стойки, посредством упругих элементов , и бензобак, охватывающий верхний конец стойки и помещенный между опорными пластинами, расположенными перпендикул рно стойке, и св занный со стойкой упругим элементом, выполненным в виде гофрированного кольца 2.A known portable chain saw containing a sawing motor, a rack with eyelets and a clamping screw, control handles rigidly connected to a support frame connected to the stand arms by means of elastic elements, and a gas tank surrounding the upper end of the rack and placed between the support plates arranged perpendicularly to the rack, and associated with a stable elastic element made in the form of a corrugated ring 2.

Эта конструкци позвол ет снизить вес мотопилы, так как в качестве инерционной массы гасител используетс бензобак, и уменьшить уровень, вибрации на двигателе и руко тках. Однако эффективность динамического гасител остаетс недостаточной вследствие по влени паразитных движений гасител , не позвол ющих осуществить острую настройку гасител по суммарному вектору пространственных колебаний верхнего конца стойки.This design allows the weight of the chainsaw to be reduced, since a gas tank is used as the inertial mass of the damper, and to reduce the level of vibration on the engine and handles. However, the effectiveness of the dynamic damper remains insufficient due to the appearance of parasitic damper movements, which do not allow a sharp tuning of the damper for the total vector of spatial oscillations of the upper end of the rack.

Целью изобретени вл етс повышение эффективности гашени вибрации.The aim of the invention is to increase the effectiveness of vibration damping.

Цель достигаетс тем, что на верхнем конце стойки смонтирован стакан, торцы бензобака имеют пазы, причем опорныеThe goal is achieved by the fact that a glass is mounted at the upper end of the rack, the ends of the gas tank have grooves, and

,с Пластины выполнены упругими и изогнутыми , расположены симметрично оси стойки и одни их концы закреплены в стакане, а другие размещены в пазах бензобака.The plates are made elastic and curved, are arranged symmetrically to the axis of the rack, and their ends are fixed in the glass, while others are placed in the slots of the gas tank.

На фиг. 1 изображена переносна моторна пила, общий вид; на фиг. 2 - вид FIG. 1 shows a portable motor-saw, general view; in fig. 2 - view

Claims

20 along arrow A in FIG. one; in fig. 3 is a section BB in FIG. 2; in fig. 4 is a view along arrow B in FIG. 2; in fig. 5 is a section of YYD in FIG. 4. The portable motor saw contains the motor 1, the sawing apparatus 2 and the stand 3 with lugs 4. The operating knobs 5 are rigidly connected to a support frame 6 connected to the lugs 4 by shock absorbers 7 made in the form of cylindrical equal-spring springs arranged evenly around the circumference, the center of which coincides with the center of the frame of the frame 6. The gas tank 8 is made in the form of a ring covering the upper end of the rack 3, and is placed between the supporting plates 9, 10, located perpendicular to the axis of the rack 3. The gas tank cavity is divided by partitions 11 with librovannymi apertures into cells with variable volume, umenschayuschims in the vertical direction toward the drain holes 12. Between the fuel tank and rack set resilient member 13 and a cup 14. The elastic member 13 is formed as a corrugated ring. the corrugations of which are located along the stand 3. The support plate 10 can be made integral with the cup 14. Both onopHiJe plates 9 and 10 are made resilient, provided with bends 15, 16 directed toward the gas tank and arranged in pairs in a plane passing through the axis of the stand. The bends 15, 16 are placed in the slots 17, 18, made at the ends of the gas tank. The cup 14 is rotatable with respect to the upper end of the stand and rigidly fixed together with the support plate 9 to the stand with the aid of a fastening screw 19. The operation of the portable motor saw is carried out as follows. Engine 1 generates spatial oscillations transmitted through rack 3, spacers 4, shock absorbers 7 on handles 5 of support frame 6. The module of the total vector of spatial vibrations of the upper end of the rack and its location in space depend on the dynamic properties of the nodes. motor saws, engine equilibrium degrees, etc., and for each motor saw, are individual. The gas tank, elastically mounted on the rack, is a dynamic damper and, oscillating in antiphase with the upper end of the rack on the elastic corrugated element 13 and the limb 15, 16, dissipates the vibrational energy and reduces the vibration level at the entrance to the shock absorbers 7. The presence of grooves 17, 18 in which the bends 15, 16, as well as the cup 14 and the clamping screw 19 are placed, limits the spatial movement of the gas tank and allows its setting for each chain saw so that the total vector of maximum gas tank shifts Adal with the total vector space Kanz upper strut vibrations. This makes it possible to damp the spatial oscillations of surface 4 with the greatest efficiency. as the parasitic oscillations of the gas tank are eliminated. The setting of the extinguisher is carried out in the following sequence. The experimental direction determines the direction of the total vector of spatial oscillations of the upper end of the rack 3. Loosen the screw 19 and turn the cup 14 with the supporting plates 9, 10 around the axis of the rack so that the plane of the bends 15, 16 mostly coincides with the plane of the total vector of spatial oscillations the upper end of the stand, and re-fix the cup 14 and the support plate 9 to the stand with a screw 19. There is substantial friction between the gas tank and the limb 15, 16, as well as between the elastic corrugators By this element 13, glass 14, and a gas tank, this leads to additional dissipation of the energy of the oscillations of the rack, clears the frequency range of the effective operation of the dynamic damper and increases the reliability of the device. The baffles 11 reduce the free movement of the fuel, since the calibrated orifices limit the rapid flow of fuel by throttling, thereby increasing the reduced mass of fuel involved in fuel tank oscillations. The design of the saw allows, almost without increasing its weight, to reduce the total vibration vector at the upper end of the stand. Claims of the invention A portable motor-saw, comprising a motor with a sawing apparatus, a stand with a fixed screw in its upper part and strips, mounted on a stand by means of support plates and a gas tank designed as a ring, the cavity of which is divided into cells with a volume decreasing in the vertical direction, the handle control knobs and binding handles with stand pads, shock absorbers and an elastic corrugated element installed between the gas tank and the pillar, so that, in order to increase the efficiency of extinguishing vibration at the upper end of the strut is mounted a glass tank capacity ,, ends have grooves, wherein oporHbie plates are made resilient and bent symmetrically arranged RACK axis and one of Konda fixed to the glass, and others are placed in the grooves of the gas tank. Sources of information taken into account in the examination 1. USSR author's certificate number 616128, cl. B 27 B 17/00, 1978.

2. Author's certificate of the USSR in application number 2799231, cl. B 27 B 17/00, 197S.

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